Leeches suck blood because it is a very good food for them. Some leeches only need to feed once a year.
Pixabay, CC BY-SACurious Kids is a series for children. If you have a question you’d like an expert to answer, send it to curiouskids@theconversation.edu.au You might also like the podcast Imagine This, a co-production between ABC KIDS...
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